1213440244 has 12 divisors (see below), whose sum is σ = 2235284800. Its totient is φ = 574787448.

The previous prime is 1213440227. The next prime is 1213440257. The reversal of 1213440244 is 4420443121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7983084 + ... + 7983235.

Almost surely, 2^1213440244 is an apocalyptic number.

It is an amenable number.

1213440244 is a deficient number, since it is larger than the sum of its proper divisors (1021844556).

1213440244 is a wasteful number, since it uses less digits than its factorization.

1213440244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15966342 (or 15966340 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1213440244 is about 34834.4691936019. The cubic root of 1213440244 is about 1066.6111797092.

Adding to 1213440244 its reverse (4420443121), we get a palindrome (5633883365).

The spelling of 1213440244 in words is "one billion, two hundred thirteen million, four hundred forty thousand, two hundred forty-four".